text: /* Copyright (c) 2018 Anakin Authors, Inc. All Rights Reserved.
  
     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at
  
         http://www.apache.org/licenses/LICENSE-2.0
  
     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
  */
  
  #ifndef ANAKIN_SABER_FUNCS_MATCH_MATRIX_H
  #define ANAKIN_SABER_FUNCS_MATCH_MATRIX_H
  
  #include "saber/funcs/base.h"
  #include "saber/funcs/impl/impl_base.h"
  #include "saber/funcs/impl/impl_match_matrix.h"
  
  #ifdef NVIDIA_GPU
  #include "saber/funcs/impl/cuda/saber_match_matrix.h"
  #endif
  
  #ifdef USE_X86_PLACE
  #include "saber/funcs/impl/x86/saber_match_matrix.h"
  #endif
  
  #ifdef USE_AMD
  #endif
  
  #ifdef USE_ARM_PLACE
  #endif
  
  #ifdef USE_BM
  #endif
  
  namespace anakin {
  namespace saber {
  
  template<typename TargetType,
          DataType OpDtype>
  class MatchMatrix : public BaseFunc<
          TargetType,
          OpDtype,
          ImplBase,
          MatchMatrixParam> {
  public:
      using BaseFunc<
              TargetType,
              OpDtype,
              ImplBase,
              MatchMatrixParam>::BaseFunc;
  
      MatchMatrix() = default;
  
      typedef Tensor<TargetType> InDataTensor;
      typedef Tensor<TargetType> OutDataTensor;
      typedef Tensor<TargetType> OpTensor;
      typedef MatchMatrixParam<TargetType> Param_t;
      typedef std::vector<InDataTensor *> Input_v;
      typedef std::vector<OutDataTensor *> Output_v;
      typedef std::vector<Shape> Shape_v;
  
      virtual SaberStatus compute_output_shape(const Input_v &input,
                                               Output_v &output, Param_t &param) override {
  
          int num = input[0]->num();
          int channel = input[0]->channel();
          CHECK(input[0]->get_seq_offset().size() > 0 
              && input[1]->get_seq_offset().size() > 0) << "inputs offset are not valid";
          auto l_offset = input[0]->get_seq_offset()[0];
          auto r_offset= input[1]->get_seq_offset()[0];
          int len_l = l_offset[1] - l_offset[0];
          for (int i = 1; i < l_offset.size() - 1; i++) {
              int cur_len = l_offset[i+1] - l_offset[i];
              CHECK_EQ(cur_len, len_l) << "each sequence of left matrix is the same length";
          }
          int max_len_r = 0;
          for (int i = 0; i < r_offset.size() - 1; i++) {
              int cur_len = r_offset[i+1] - r_offset[i];
              if (max_len_r < cur_len) {
                  max_len_r = cur_len;
              }
          }
          int max_len_l = len_l;
  
          Shape output_shape({r_offset.size() - 1, param.dim_t, max_len_l, max_len_r});
          output[0]->set_seq_offset(input[1]->get_seq_offset());
          return output[0]->set_shape(output_shape);
      }
  
      virtual SaberStatus init_impl(ImplEnum implenum) override {
          switch (implenum) {
              case VENDER_IMPL:
                  //this->_impl.push_back(new VenderMatchMatrix <TargetType,
                  this->_impl.push_back(new VenderMatchMatrix <TargetType, OpDtype>);
                  return SaberSuccess;
  
              case SABER_IMPL:
                  this->_impl.push_back(new SaberMatchMatrix <TargetType, OpDtype>);
                  return SaberSuccess;
  
              default:
                  return SaberUnImplError;
          }
      }
  
  private:
  
      virtual void pick_best_static() override {
          this->_best_impl = this->_impl[0];
      }
  
      virtual void pick_best_specify(ImplEnum implenum) override {
          this->_best_impl = this->_impl[0];
      }
  
  };
  
  } // namespace saber
  } // namespace anakin
  
  #endif
  